Embossing attachment for paper making machines



Feb. 13, 1934. A. E. coFRlN EMBOSSING ATTACHMENT FOR PAPER MAKING MACHINES Filed June 13, 1932 3 Sheets-Sheet l SN m .m S INH v m www 3 M wr- IMI nl lq xm .n .N

Feb. 13, 1934. A. E. cor-'RIN EMBOSSING ATTACHMENT FOR PAPER MAKING MACHINES Filed June 15, 1932 3 Sheets-Sheet 2 mmm/z uslm/E Coffin Feb. 13, 1934. A. E. cor-'RIN EMBOSSING ATTACHMENT FOR PAPER MAKING MACHINES Filed June 13, 1932 3 Sheets-Sheet 3 Patented Feb. 13, 1934 UNITED STATES PATENT OFFICE EMBOSSING ATTACHMENT FOR PAPER MAKING MAC EINES 12 Claims.

The invention relates to a device for embossing paper, as paper toweling, and has as an object the provision of an attachment which may be applied to a paper making machine to provide embossed .A ridges on the paper during its passing through the machine..

It is a further object of the invention to provide an embossing attachment providing for a separation of the rolls to render possible the threading of the paper through the attachment when starting the machine and of then bringing the embossing rolls into coacting relation with their coacting ridges and grooves in accurate mesh with each other.

Further objects of the invention will appear from the following description when read in connection with the accompanying drawings showing an illustrative embodiment of the invention and whereinz- Fig. 1 is an end view partly in section;

Fig. 2 is a vertical section on line 2-2 of Fig. l on an enlarged scale;

Fig. 3 is a vertical section on line 3-3 of Fig. 2; Fig. 4 is a plan view broken away to reduce the extent of the gure;

Fig. 5 is a detail sectional view on line 5-5 of Fig. 4 upon an enlarged scale;

Fig. 6 is a detail plan view of a portion of a roll upon an enlarged scale showing two embossing rings as assembled upon the roll for producing a herringbone embossing; and

Fig, 7 is a detail end view of a portion of two coacting rolls upon an enlarged scale.

Paper to be embossed is advantageously moist in order better to take the embossing. In providing longitudinal ridges and grooves in the paper the tendency of the paper, particularly when moist, to adhere to one of the rolls as it is threaded therebetween may be counteracted by a doctor blade having ridges upon its edge to enter the grooves.

bone or transversely ribbed paper as the doctor blade will catch upon the ridges upon the embossing roll and be destroyed. This type of embossing can be produced upon a separate machine as the paper may be threaded through the machine before the machine is started into action.

The present attachment is intended to be used to emboss paper as fast as produced by a paper making machine and is designed to be placed in the course of the paper through the machine either at the beginning of the dry end of the machine or just previous to the passage of the paper about the drier or after the paper has 55 passed over one or more sections of the dryer or,

This cannot be done with a herringwhere paper is creped as it runs through the machine, the present attachment may beplaced just after the creping device and before the paper is dried after creping. In any of these positions, particularly when producing a herringbone or 50 transverse arrangementof ridges and grooves, the drive of the embossing rolls must be at the speed oi the paper making machine and must be running when the machine is started into operation. It would be impossible to thread such an attachment if the rolls were constantly in coacting relationA for the reason that the paper would adhere to one of the rolls and wind, thereon, and in the types of embossing referred to for the reason above given, a doctor blade cannot be applied to strip the paper from the embossing roll.

In accordance with' the invention the embossing rolls are arranged tobe separated during the threading operation, both rolls being continuously driven Whether separated or brought together and after the machineis threaded the rolls may be brought together with the ridges and grooves upon the two rolls in accurate mesh for vide Ways for sliding blocks 20, 21, which blocks carry bearings 22 for a movable roll 23. To drive the movable roll a bevel gear 24 is carried by the shaft 26 of the roll 15 and a counter shaft 27 journalled in bearing 28 carried by upright 11 has keyed thereto a bevel gear 29 in mesh with gear 24.A The block 20 in its extension 30 carries a bearing for a bevel gear 31 feathered upon the counter shaft 27.and revolves in a bearing 32. The bevel gear 31 is in mesh with a gear 33 upon the shaft of the roll 23. By this Aarrangement the blocks 20, 21 may be moved in their ways and the roll 23 may be continuously driven by the sliding gear 31 without destroying the meshing relation of the ribs and grooves upon the two rollers.

To move the roll 23 there is shown a shaft 34 mounted in blocks 35, 36, and pinned to said shaft are toggle arms 37, 38 engaging a second pair of toggle arms 39, 40, which latter in turn are pivoted to lugs 41, 42 formed upon blocks 20, 21. To operate the toggles through the shaft 34 there is shown a handle 43 ykeyed to the end of the shaft.

To provide spring pressure between the rolls 15-23, compression springs 44, 45 are shown abutting against the uprights 46, 47 of the supports 10 and against nuts 48, 49 screwed upon nipples 50 pinned to the blocks 35, 36, as clearly shown in Fig. -3.

The springs 44, 45 are maintained in position through the medium of bolts 51, 52 taking into nipples 50. When the rolls 15 and 23 are in coacting relation the heads of the bolts 51, 52 stand slightly clear of the members 46, 47 to allow the spring pressure to act upon the rolls through the straightened toggle arms and the tension of the springs may be adjusted by turning out the nuts 48, 49.

When it is desired to thread the paper between the rolls in the starting of the machine, the handle 43 may be raised to bring the parts to the dot and dash lines shown in Fig. l, when the rolls will be separated but will be in continuous motion with their coacting ridges and grooves in correct meshing relation ready to impress their design upon the paper.

A guard rail 53 is shown supported in brackets 54. 55 carried by theblocks 20, 21.

The rolls shown in detail in Figs. 5-'7 are designed to provide a herringbone design of embossing. To this end the rolls comprise stub shafts 56 entering blocks 57 in the end of shells 58 of the roll. The embossing design is formed upon the periphery of the rings 59 which are telescoped upon the shell 58 and retained thereon by means of a ring 60 at each 'end of the rolls, which ring is retained by set screws 61. For lightness the rings 59 are shown as formed of a T-shape cross section.

In the herringbone design to be produced by the rolls as shown, the oppcsitely sloping diagonal ridges and grooves are staggered in adjacent courses and to render this possible grooves 62 are formed in the rolls by chamfering the corners thereof so that the meeting point between a rib and a groove at adjacent courses thereof shall not puncture the paper as would occur if the ends of the ribs and grooves were formed in the same vertical plane. This relation is maintained whether the design is a herringbone as shown in Fig. 6 or whether the ribs and grooves extend parallel with the axis of the rolls and divided into courses in the same manner as with the herringbone design.

By the provision of the invention it is possible to produce the designs named in paper upon a paper making machine during the course of the manufacture of the paper and the attachment can be successfully threaded when the machine is placed into operation.

Minor changes may be made in the physical embodiment of the invention within the scope of 'the'.appended claims without departing from the spirit thereof.

I claim:

1. A device for embossing paper, comprising in combination: coacting embossing rolls bearing on their surfaces complementary raised and depressed embossing elements; and means for wide- 1y separating and approximating said rolls whereby to permit paper to be threaded through the same lwhen separated. t

2. A device for embossingpaper comprising, in combination: coacting embossing rolls bearing on their surfaces complementary raised and depressed embossing elements; means for widely separating and approximating said rolls between sheet threading and embossing positions; and

means to drive said rolls in synchronism in all positions.

3. A device for embossing paper comprising. in combination: coacting embossing rolls bearing on their surfaces complementary raised and depressed embossing elements; means for widely separating and approximating said rolls between sheet threading and embossing positions; and means to ensure proper meshing of said complementary embossing elements when said rolls are approximated.

4. A device for embossing paper comprising, in combination: coacting embossing rolls; one of said rolls bearing embossing elements on its surface; relatively movable bearing means for said rolls to adapt the rolls for wide separation and approximation between sheet threading and embossing positions; and means to drive said rolls.

5. Paper embossing apparatus comprising, in combination: an embossing roll mounted in stationary bearings; a second embossing roll to coact with the first named roll and mounted in bearings movable to sheet threading position; and means to drive said rolls in synchronism in all positions of said movable bearings.

6. Paper embossing apparatus comprising, in combination: an embossing roll mounted in stationary bearings; A.a second embossing roll to coact with the rst named roll and mounted in bearings movable to sheet threading position; means to drive said rolls in synchronism in all positions of said movable bearings; and means to press said second named roll toward the iirst named roll in paper embossing position.

7. Paper embossing apparatus comprising, in combination: a pair of embossing rolls formed with complementary raised and depressed portions; stationary bearings for one of said rolls; movable bearings for the remaining roll; means to move said movable bearings between positions of widelyspaced relation of the rolls and of juxtapositions thereof with meshing of said raised and depressed portions; and means to drive said rolls in synchronis'm during -movements of said bearings.

8. Paper embossing apparatus comprising, in combination: a driven embossing roll mounted in stationary bearings; a pair of slidable blocks; a second embossing roll mounted in bearings carried by said blocks to coact with the iirst named roll; abutments spaced from said blocks; a pair of toggle arms acting between each of said abutments and the respective blocks; said arms when straightened forcing said rolls into coacting relation and when broken separating said rolls; and means to drive the block mounted roll in synchronism with the stationarily mounted roll in all-positions of said toggle arms.

9. Paper embossing apparatus comprising, in combination: a driven embossing roll mounted in stationary bearings; a bevel gear secured to the shaft of said roll; a counter shaft bearing a second bevel gear in mesh with the iirst named gear, a pair of movable blocks; a second embossing roll mounted in bearings therein; a second pair of bevel gears one secured to the movable embossing roll and the second mounted in a bearing on one of said blocks and slidably feathered on said counter shaft whereby to provide for separation of said rolls and synchronous drive of said rolls in all positions and means to move said blocks and roll.

10. The process of making and embossing paper as a continuing operation which comprises the steps of: producing a wet sheet in a paper making machine; removing water from the sheet; embossing the sheet by means continuously driven by the drive of the machine ;l and completing the drying of the embossed sheet. l

11. The process' of making and embossing paper as a continuing operation which comprises the steps of: producing a. Wet sheet in a paper making machine; partially drying the sheet by the application of drying temperature, to make the physical condition of the sheet suitable for embossing; embossing the sheet by means continuously driven by the drive of the machine; and completing the drying of the embossed sheet.

AUSTIN E. COFRIN. 

